Calculator.exe is located in a subfolder of C:Program Files. Known file sizes on Windows 10/8/7/XP are 3,746,816 bytes (32% of all occurrences), 3,495,936 bytes and 12 more variants. The program has a visible window. It is not a Windows core file. There is no file information.
The School of Athens. The School of Athens (Italian: Scuola di Atene) is one of the most famous frescoes by the Italian Renaissance artist Raphael. It was painted between 1509 and 1511 as a part of Raphael's commission to decorate the rooms now known as the Stanze di Raffaello, in the Apostolic Palace in the Vatican.
His fresco called The School of Athens is also immensely famous. It is really hard to come up with just one, since Raphael had so many incredibly famous paintings but, I think that the most recognized one is without a doubt the 'two little angels' that appear as a detail on a painting called the Sistine Madonna. Do an Internet search to see an image of it. You will recognize it immediately.